Diff: targets/hal/TARGET_STM/TARGET_NUCLEO_L152RE/rtc_api.c

Revision:

496:543871686697

Parent:

495:01cb89f68337

Child:

497:d54623194236

--- a/targets/hal/TARGET_STM/TARGET_NUCLEO_L152RE/rtc_api.c	Fri Mar 20 09:30:08 2015 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,203 +0,0 @@
-/* mbed Microcontroller Library
- *******************************************************************************
- * Copyright (c) 2014, STMicroelectronics
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- * 3. Neither the name of STMicroelectronics nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *******************************************************************************
- */
-#include "rtc_api.h"
-
-#if DEVICE_RTC
-
-#include "mbed_error.h"
-
-static int rtc_inited = 0;
-
-static RTC_HandleTypeDef RtcHandle;
-
-void rtc_init(void)
-{
-    RCC_OscInitTypeDef RCC_OscInitStruct;
-    uint32_t rtc_freq = 0;
-
-    if (rtc_inited) return;
-    rtc_inited = 1;
-
-    RtcHandle.Instance = RTC;
-
-    // Enable Power clock
-    __PWR_CLK_ENABLE();
-
-    // Enable access to Backup domain
-    HAL_PWR_EnableBkUpAccess();
-
-    // Reset Backup domain
-    __HAL_RCC_BACKUPRESET_FORCE();
-    __HAL_RCC_BACKUPRESET_RELEASE();
-
-    // Enable LSE Oscillator
-    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE;
-    RCC_OscInitStruct.PLL.PLLState   = RCC_PLL_NONE; // Mandatory, otherwise the PLL is reconfigured!
-    RCC_OscInitStruct.LSEState       = RCC_LSE_ON; // External 32.768 kHz clock on OSC_IN/OSC_OUT
-    if (HAL_RCC_OscConfig(&RCC_OscInitStruct) == HAL_OK) {
-        // Connect LSE to RTC
-        __HAL_RCC_RTC_CLKPRESCALER(RCC_RTCCLKSOURCE_LSE);
-        __HAL_RCC_RTC_CONFIG(RCC_RTCCLKSOURCE_LSE);
-        rtc_freq = LSE_VALUE;
-    } else {
-        // Enable LSI clock
-        RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE;
-        RCC_OscInitStruct.PLL.PLLState   = RCC_PLL_NONE; // Mandatory, otherwise the PLL is reconfigured!
-        RCC_OscInitStruct.LSEState       = RCC_LSE_OFF;
-        RCC_OscInitStruct.LSIState       = RCC_LSI_ON;
-        if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
-            error("RTC error: LSI clock initialization failed.");
-        }
-        // Connect LSI to RTC
-        __HAL_RCC_RTC_CLKPRESCALER(RCC_RTCCLKSOURCE_LSI);
-        __HAL_RCC_RTC_CONFIG(RCC_RTCCLKSOURCE_LSI);
-        // This value is LSI typical value. To be measured precisely using a timer input capture for example.
-        rtc_freq = 40000;
-    }
-
-    // Enable RTC
-    __HAL_RCC_RTC_ENABLE();
-
-    RtcHandle.Init.HourFormat     = RTC_HOURFORMAT_24;
-    RtcHandle.Init.AsynchPrediv   = 127;
-    RtcHandle.Init.SynchPrediv    = (rtc_freq / 128) - 1;
-    RtcHandle.Init.OutPut         = RTC_OUTPUT_DISABLE;
-    RtcHandle.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
-    RtcHandle.Init.OutPutType     = RTC_OUTPUT_TYPE_OPENDRAIN;
-
-    if (HAL_RTC_Init(&RtcHandle) != HAL_OK) {
-        error("RTC error: RTC initialization failed.");
-    }
-}
-
-void rtc_free(void)
-{
-    // Enable Power clock
-    __PWR_CLK_ENABLE();
-
-    // Enable access to Backup domain
-    HAL_PWR_EnableBkUpAccess();
-
-    // Reset Backup domain
-    __HAL_RCC_BACKUPRESET_FORCE();
-    __HAL_RCC_BACKUPRESET_RELEASE();
-
-    // Disable access to Backup domain
-    HAL_PWR_DisableBkUpAccess();
-
-    // Disable LSI and LSE clocks
-    RCC_OscInitTypeDef RCC_OscInitStruct;
-    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE;
-    RCC_OscInitStruct.PLL.PLLState   = RCC_PLL_NONE;
-    RCC_OscInitStruct.LSIState       = RCC_LSI_OFF;
-    RCC_OscInitStruct.LSEState       = RCC_LSE_OFF;
-    HAL_RCC_OscConfig(&RCC_OscInitStruct);
-
-    rtc_inited = 0;
-}
-
-int rtc_isenabled(void)
-{
-    return rtc_inited;
-}
-
-/*
- RTC Registers
-   RTC_WeekDay 1=monday, 2=tuesday, ..., 7=sunday
-   RTC_Month   1=january, 2=february, ..., 12=december
-   RTC_Date    day of the month 1-31
-   RTC_Year    year 0-99
- struct tm
-   tm_sec      seconds after the minute 0-61
-   tm_min      minutes after the hour 0-59
-   tm_hour     hours since midnight 0-23
-   tm_mday     day of the month 1-31
-   tm_mon      months since January 0-11
-   tm_year     years since 1900
-   tm_wday     days since Sunday 0-6
-   tm_yday     days since January 1 0-365
-   tm_isdst    Daylight Saving Time flag
-*/
-time_t rtc_read(void)
-{
-    RTC_DateTypeDef dateStruct;
-    RTC_TimeTypeDef timeStruct;
-    struct tm timeinfo;
-
-    RtcHandle.Instance = RTC;
-
-    // Read actual date and time
-    // Warning: the time must be read first!
-    HAL_RTC_GetTime(&RtcHandle, &timeStruct, FORMAT_BIN);
-    HAL_RTC_GetDate(&RtcHandle, &dateStruct, FORMAT_BIN);
-
-    // Setup a tm structure based on the RTC
-    timeinfo.tm_wday = dateStruct.WeekDay;
-    timeinfo.tm_mon  = dateStruct.Month - 1;
-    timeinfo.tm_mday = dateStruct.Date;
-    timeinfo.tm_year = dateStruct.Year + 100;
-    timeinfo.tm_hour = timeStruct.Hours;
-    timeinfo.tm_min  = timeStruct.Minutes;
-    timeinfo.tm_sec  = timeStruct.Seconds;
-
-    // Convert to timestamp
-    time_t t = mktime(&timeinfo);
-
-    return t;
-}
-
-void rtc_write(time_t t)
-{
-    RTC_DateTypeDef dateStruct;
-    RTC_TimeTypeDef timeStruct;
-
-    RtcHandle.Instance = RTC;
-
-    // Convert the time into a tm
-    struct tm *timeinfo = localtime(&t);
-
-    // Fill RTC structures
-    dateStruct.WeekDay        = timeinfo->tm_wday;
-    dateStruct.Month          = timeinfo->tm_mon + 1;
-    dateStruct.Date           = timeinfo->tm_mday;
-    dateStruct.Year           = timeinfo->tm_year - 100;
-    timeStruct.Hours          = timeinfo->tm_hour;
-    timeStruct.Minutes        = timeinfo->tm_min;
-    timeStruct.Seconds        = timeinfo->tm_sec;
-    timeStruct.TimeFormat     = RTC_HOURFORMAT12_PM;
-    timeStruct.DayLightSaving = RTC_DAYLIGHTSAVING_NONE;
-    timeStruct.StoreOperation = RTC_STOREOPERATION_RESET;
-
-    // Change the RTC current date/time
-    HAL_RTC_SetDate(&RtcHandle, &dateStruct, FORMAT_BIN);
-    HAL_RTC_SetTime(&RtcHandle, &timeStruct, FORMAT_BIN);
-}
-
-#endif